"giant elk" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "giant elk",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Cervids",
          "orig": "en:Cervids",
          "parents": [
            "Even-toed ungulates",
            "Mammals",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of Irish elk (†Megaloceros giganteus)"
      ],
      "id": "en-giant_elk-en-noun-mN4KI35G",
      "links": [
        [
          "Irish elk",
          "Irish elk#English"
        ]
      ],
      "synonyms": [
        {
          "extra": "†Megaloceros giganteus",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Irish elk"
        }
      ]
    }
  ],
  "word": "giant elk"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "giant elk",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "Entries using missing taxonomic name (species)",
        "en:Cervids"
      ],
      "glosses": [
        "Synonym of Irish elk (†Megaloceros giganteus)"
      ],
      "links": [
        [
          "Irish elk",
          "Irish elk#English"
        ]
      ],
      "synonyms": [
        {
          "extra": "†Megaloceros giganteus",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Irish elk"
        }
      ]
    }
  ],
  "word": "giant elk"
}